She was described as "effervescent" and loving by those she left behind.
Udayaditya Konwar, who loved mixed martial arts and playing the guitar, died over the summer.
Dennis was in the middle of a medical malpractice lawsuit against her doctor.
Abramowitz died on Aug. 18 after contracting pneumonia.
Among other objectives, the five people will build a comprehensive timeline of the school's response and provide recommendations.
“It sucks to be in this community. No parent should have to lose a child."
He also ruled that evidence from Urbanski's phone is admissible in trial.
Maryland Gov. Larry Hogan called for the probe Thursday.
Urbanski, who is accused of killing Richard Collins, didn't show for the hearing.